name: PHP Coding Standards

on:
    push:
        branches:
            - trunk
    pull_request:

jobs:
    # Runs PHP coding standards checks.
    # Note: Inspired by https://github.com/WordPress/wordpress-develop/blob/master/.github/workflows/coding-standards.yml
    #
    # Violations are reported inline with annotations.
    #
    # Performs the following steps:
    # - Checks out the repository.
    # - Configures caching for Composer.
    # - Sets up PHP.
    # - Logs debug information.
    # - Installs Composer dependencies (from cache if possible).
    # - Logs PHP_CodeSniffer debug information.
    # - Runs PHPCS on the full codebase with warnings suppressed.
    # - todo: Configure Slack notifications for failing scans.
    phpcs:
        name: PHP coding standards
        runs-on: ubuntu-latest
        steps:
            - name: Checkout repository
              uses: actions/checkout@v3

            - name: Get Composer cache directory
              id: composer-cache
              run: echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT


            - name: Set up Composer caching
              uses: actions/cache@v3
              env:
                  cache-name: cache-composer-dependencies
              with:
                  path: ${{ steps.composer-cache.outputs.dir }}
                  key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
                  restore-keys: |
                      ${{ runner.os }}-composer-
            - name: Set up PHP
              uses: shivammathur/setup-php@v2
              with:
                  php-version: '8.0'
                  coverage: none
                  tools: composer, cs2pr

            - name: Log debug information
              run: |
                  php --version
                  composer --version
            - name: Install Composer dependencies
              run: |
                  composer install --prefer-dist --no-suggest --no-progress --no-ansi --no-interaction
                  echo "${PWD}/vendor/bin" >> $GITHUB_PATH
            - name: Log PHPCS debug information
              run: phpcs -i

            - name: Run PHPCS on all changed files
              run: |
                phpcs ./src -q --report=checkstyle | cs2pr